Link for automatic fire extinguishers or appliances.



w.- A. GOEDTHWAIT. LINK FOR AUTOMATIC FIRE BXTINGUISHERS 0R APPLIANCES. APPLICATION FILED APR. 13. 1908.

924,760. Patented Ju e 15,1909..-

To all wi e/om t e s F83 AUTCMATZG HERE I-iNG-UZF T l-5'1 CGTLCQT'JZ. Be it known test I. WILLIAM GOLD- rim air, a citizen or the Lint-ed Litmus. resulat liielrose Park, in the county of look and State of Ellinois, have invented certain new and useful ii provemeiits in Links for Automatic Fire 'tioguishers or Appliances, of which the following is a soeciiicetion.

.The use of fusible linlrs, or more aocurately seeaking, link made up of members united by solder fusible at a predetermined temperature for holding the parts of the ff&lVG-il0lll11g devices of sprinkler heads is Well understood by those skilled 1n the art.

So, also, is the use oi suclrlinlzs for holding fire doors, and for other pturposes in the art of fire extinguishing. I

it is to such alinlt that the present inven' tion relates, and the object of the invention to provide link of improved construction.

To this end, the invention consists in the features novelty that are hereinafter de scribed with reiereiice to the accompanying drawing, which is mode a part of this specification, tvoielr:

Figure l is s perspective View of link erubodying the invention in'its preferred form. big. 2 is a trerisversesection thereof. Fig. 3

isa perspective View of link embodying the nvention under a modificetion.

Fig. i is a transverse section thereof! The link comprises two overleppingfmerm oer-s, A, end an interposed pert, B, herein cell d a rocker. The rocker is tubular and preferably of cylindrical form and has, in its outer surface, two longitudinal grooves which result in longitudinal shoulders, b, said grooves, and consequently the shoulders loomg; located diametrically opposite eecli other.

These .grooves are preferably formed by a punch or die wliiclil indent-s Without perforao ing, sides of the tube, but this is immaterial, the r :ntial (linel shoulders.

The members r ere made of thin sheet .metal and is. the preferred i i rm oi the invention each of them comprises two wings a and. a of unequal Widths and en intermediate semi-cylindrical portion The surfaces of the members meet each other, and of coo c features being the longitu lie in e diamctrical plane of the rocker and the Wing (l Ol'fififili member lies against udinei shoulder r Qlfil, d this shoulder is preferably the result of an external groove made by e punch or die. The parts Whose relative movement away from each other, such for example, as

the projecting lever-arm of the members of at two part strut of a sprinkler head, engage or are attached to the Wings (2 and to this end said wings are provided with openings and- The meeting surfaces of all of the parts are secured together by solder fusible at a predetermined temperature.

In the preferred form of the device the,

strain falls in aplane which is practically diametrlcal Wllill respect to the rocker, this being due to tire feet that each memberA- embraces the rocker, through 180. The solder joint is relieved from the greater part of this strain by the engaging shoulders oftlie rocker and members A, and the extent to which the joint is thus relieved or, in other Words, the sensitiveness of the link depends upon the positions of said shoulders and. consequently the line oistrain with relation to the axis of rotation. of the rocker. in this preferred form the shoulders are shown. as being located only a few degrees removed from the dienietrical'plsne aforesaid, or line of strain, and by locating said shoulders a greater or less number of degrees from said. plane, their effect in relieving the solder joint will be decreased or increased, as the case may be.

lotheinoditied form of the invention the lines of strain are farther from the axis of movement of -le rocker than in the preferred. form, so that e link will be more sensitive.

The advantage of s hollow o1 tubule;

rocker is that it exposes a maximum area of the solder joint to the atmosphere so that the joint will quickly res world to .9. rise inten1- peretore. With a so is rocker only the outside snrifeeefot' the body of solder is exposed to the rise in temperature while with a hollow rocker both the inside and the outside surfaces of the body oi solder are thus exposed.

By malais the wings a wider than the wings the device becomes ii strut adapted to resist compressive streins in various lire extinguishing apparatus.

What I claim as new is:

1. A fusible element for use in automatic fire extinguishing apparatus, having a cylindrical rocker and two members having" wings projecting-from opposite sides of the rocker and adapted to receive the strain to be resisted, each of said members having also a portion partially embracing the rocker and fitting closely thereto, said 'members and rocker having longitudinal shoulders engaging each other, the meeting surfaces of said members and rocker being secured together by solder.

2Q A fusible clement'for use in automatic fire extin uishing apparatus, having a cylindrical roelaer and two members having wings of unequal Widths, the surfaces of which meet in a diametrical plane of said rocker, and having also, between said wings, portions which partially embrace the roeker and fit 2 closely thereto, said members and rocker being 1provided with engaging longitudinal shou ders located on opposite sides of said, plane.

3. An element for use in automatic fire 25 sides of said rocker, the rocker and those 30 portions of said members which partially embrace it, as aforesaid, having engaging lon itudinal shoulders, the meetin surfaces of t e parts being secured to etherliy solder;

WILLIAM A. GO JDTHWAIT. Witnesses V LJM HOPKINs, i FRANK E. BALLARD. 

